Initial UI for Metrics in Observatory

runtime/bin/vmservice/observatory/lib/src/app/application.dart

Index: runtime/bin/vmservice/observatory/lib/src/app/application.dart
diff --git a/runtime/bin/vmservice/observatory/lib/src/app/application.dart b/runtime/bin/vmservice/observatory/lib/src/app/application.dart
index 84a5ae219a42515801db66914c6e5054c97f6b69..a181669156f27a6809c778603572771e440ec1ad 100644
--- a/runtime/bin/vmservice/observatory/lib/src/app/application.dart
+++ b/runtime/bin/vmservice/observatory/lib/src/app/application.dart
@@ -75,7 +75,7 @@ class ObservatoryApplication extends Observable {
         removePauseEvents(event.isolate);
         // vm.reload();
         break;
-        
+
       case 'BreakpointResolved':
         event.isolate.reloadBreakpoints();
         break;
@@ -99,6 +99,7 @@ class ObservatoryApplication extends Observable {
     _pageRegistry.add(new ClassTreePage(this));
     _pageRegistry.add(new VMConnectPage(this));
     _pageRegistry.add(new ErrorViewPage(this));
+    _pageRegistry.add(new MetricsPage(this));
     // Note that ServiceObjectPage must be the last entry in the list as it is
     // the catch all.
     _pageRegistry.add(new ServiceObjectPage(this));